Organ action magnet



J1me 37- A. FLORO ET AL. 2,033,644

ORGAN ACTION MAGNET Filed July 6, 1936 W h. A

INVENTORS A/berf F/oro, 4 g! barf 6. abal ATTO'RNEY Patented June 15, 1937 UNITED STATES OFFIQE.

ORGAN ACTION MAGNET D y, Kansas Lawrence, Kans.,

a corporation of Application July 6, 1936, Serial No. 89,028

11 Claims.

This invention relates to electromagnets, particularly those of the character used in organ actions, and has for its principal objects to provide a. magnet of this character wherein the armature is mounted for free and easy action in response to passage of relatively weak currents through the magnet winding; to provide a simple and inexpensive construction; to provide an armature mounting that is not subject to sluggish or retarded action because of corrosion, dust and the like; and to eliminate lost motion between the armature and its fulcrum so as to maintain a definite alignment of the armature.

It is also an important object of the invention to provide means for efiecting angular adjustment of the magnet support.

In accomplishing these and other objects of the invention, as hereinafter pointed out, we have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawing, wherein:

Fig. 1 is a section through a portion of a wind-box of a pipe organ and one of the organ pipes to illustrate an application of our improved electromagnet when used for operating the pipe valves which control flow of air from the windbox to the organ pipes.

Fig. 2 is a section on the line 22 of Fig. 1.

Fig. 3 is a detail perspective view of the parts of the electromagnet shown in disassembled spaced relation to better illustrate the construction.

Referring more in detail to the drawing:

I designates an electromagnet embodying the 5 features of the present invention which, in the illustrated instance, is shown as employed for operating a valve 2 that controls flow of air from the wind-box 3 of a standard pipe organ through a port 4 of one of the organ pipes 5. The elec- 49 tromagnet includes a bracket 6 preferably formed of a flat strip of magnetizable metal having a low degree of retentivity. The strip is formed to provide a leg portion 1, a laterally extending foot 8,

and an attaching flange 9, that extends in the opposite direction to the foot 8. The foot 8 is preferably formed at an obtuse angle with the leg 1 in order to position the core Ill of the magnet II at the desired angle relatively to the armature 2.

The core of the magnet is of standard construction and is supported on the foot 3 by means of a fastening device such as a screw !3 extending through an opening 14 in the foot and through a spacing washer l5 that is inserted under the core, into a threaded socket l6 of the core as 55 clearly shown in Fig. 1, the head of the screw engaging the bottom of the foot to draw the end of the core against the top side thereof. The magnet winding is carried on the core in the form of a spool I? and has its leads l3 and 19 connected to a suitable source of current for energizing the magnet as in standard practice. The upper end of the bracket 1 has the sides thereof notched adjacent the attaching flange 9, as at 26 and 2!, to provide lateral shoulders 22 and 23 inclined from the front face 24 of the bracket downwardly toward the rear face 25, as at 253, to provide substantially knife edge fulcrums on which the armature I2 is pivotally mounted as now to be described.

The armature i2 is also constructed of a magnetizable metal strip having low retentivity and which has its pivoted end 29 provided with an opening 30 conforming in width to that portion of the bracket between the notches 26 and 24. The side portions of the plate on the respective sides of the opening 30 are bent upwardly as at 3|, and then downwardly as at 32, at inclined angles to form substantially V-shaped seats 33 and 34 to engage the knife edge fulcrums 27 and 28. The V-shaped seats formed in the plate are at sufiicient angles so that when the fulcrums engage the vertexes thereof the arrnature is free to pivot thereon responsive to the attractive force of the magnet. The side portions of the plate are connected by an integral. bar 35 that has a notch 35 on the side thereof adjacent the opening 3!] to be engaged by the hook 31 of a coil spring 38 having its opposite end 39 hooked to an anchor 4t extending laterally from the rear face of the bracket. The forward end of the armature plate projects over and beyond the upper end of the magnet to mount the valve 2 which may consist of a disk l2 backed by a compressible pad 43 that is secured to the armature in any suitable manner.

In order to prevent any sound that might occur should the armature make contact with the end of the core Ill we provide an adjustable stop M for limiting movement of the armature in the direction of the core. The stop 44 in the illustrated instance is shown as comprising a cylindrical rod 45 having a threaded socket M in the lower end thereof to threadingly engage a screw 4'! that is anchored to the foot 8 of the bracket and extends upwardly in parallel relation with the axis of the magnet.

The upper end of the rod 45 carries a compressible pad 48 that is engaged by a similar pad 49 attached to the under side of the armature.

In order to retain the armature in fulcruming re- I lation with the bracket we provide a spring clip 50 preferably formed of spring wire bent to provide a bar portion 5| adapted to extend across the attaching face of the flange 9 and which has laterally bent ends 52 and 53 engaging the sides of the flange as shown in Fig. 2, and which terminate in inwardly bent portions 54 and 55 un-- derlying the lower face of the attaching flange to provide a loop 55 through which the flange 9 extends.

The portions 54 and 55 of the wire terminate in forwardly extending arms 5'! and 58 projecting through the notches 2i! and 2i and have rearwardly curved ends 59 and 60 adapted to bear upon the ridges forming the seats 33 and 34 to yieldingly urge the armature in seating relation with the knife edges of the fulcrums. The spring thus retains the armature from any movement on the knife edges of the fulcrum other than a pivotal movement to and from the armature.

In assembling an electromagnet action constructed as described, the magnet is secured to the foot of the bracket by threading the screw l3 through the opening it in the foot, through a spacing washer l5 of the proper thickness into the threaded socket of the magnet core. When the screw is drawn tight the magnet core is brought in contact with the foot of the bracket and held against lateral movement thereon. The stop 45 is then screwed on the adjusting post 41.

To apply the armature it is first turned laterally at right angles to the leg portion of the bracket so that the attaching flange 9 will pass through the opening 30 whereafter the armature may be brought into its operating position so that the V-shaped seats 33 and 34 engage the knife edges of the fulcrums 21 and 28. The spring clip is then applied by sliding the loop portion thereof over the attaching flange in such a manner that the arms 51 and 58 will slide under the side edges of the attaching flange and the hook shaped ends 59 and 65 will project through the notches and 2| to bear upon the ridge portions of the armature, as shown in Figs. 1 and 2. One end of the coil spring may then be engaged with the notch 36 and the other end secured to the anchoring pin 4!]. The assembly is then attached to the upper wall of the wind-box so that the axis of the valve 42 aligns with the axis of the organ pipe, the attaching flange of the bracket being secured to the upper wall of the wind-box by means of screws 6| and 62 that are extended through openings 63 and 64 on opposite sides of the bar portion 5| of the spring clip 50, the screws being adjusted so that the bracket rocks on the bar portion of the clip to bring the magnet into the desired angle relatively to the port of the organ 5. This adjustment may be effected by lighting up one of the screws and slacking off the other or vice versa.

When the magnet is in use and circuit is closed through the magnet coil, the core becomes magnetized and attracts the armature against action of the spring 38, causing the armature to fulcrum on the bracket in such a manner that the valve thereon uncovers the port 4 and allows air to flow to the organ pipe. When the current flow to the magnet is interrupted the core again becomes demagnetized so that the spring returns the armature to valving position thereby shutting off flow of air to the organ pipes.

While we have particularly illustrate-d our invention as used in conjunction with the valve of an organ pipe, it is adapted for use in connection with other operating parts of an organ action and we do not wish to limit ourselves to the specific adaptation illustrated and described herein.

From the foregoing it is obvious that the knife edge mounting of the armature provides for free and easy action thereof so that the armature is responsive to relatively weak currents passed through the winding of the magnet. The knife edge mounting of the armature also eliminates any side or other play that may tend to move the valve out of registry with the port 4. Attention is also directed to the fact that the spring which normally retains the valve seated over the port 4 is out of the magnetic field of the magnet since it is completely shielded by the leg portion of the bracket.

What we claim and desire to secure by Letters Patent is:

1. In an apparatus of the character described, a bracket having a knife edge fulcrum, a mag net carried by the bracket, an armature for the magnet having a V-shaped seat engaging said fulcrum, and means engaging the armature for retaining the armature in fulcruming position relatively to the magnet.

2. In an apparatus of the character described, a bracket having a knife edge fulcrum, a magnet carried by the bracket, an armature having a V-shaped seat engaging said fulcrum, and a spring clip fixed to the bracket and having arm portions bearing against the armature for re taining the armature in pivoted position on said fulcrum.

3. In an apparatus of the character described, a bracket having a knife edge fulcrum, a magnet carried by the bracket, an armature having a V-shaped seat engaging said fulcrum, a spring clip fixed to the bracket and having arm portions bearing against the armature for retaining the armature in pivoted position on said fulcrum, and a spring connected with the armature and anchored to the bracket to normally retain the armature in one pivoted position relatively to the magnet.

4. In an apparatus of the character described, a bracket having laterally extending foot and attaching flange portions and having opposite sides thereof notched below the attaching flange portion to form knife edge fulcrums, a magnet carried by the foot portion of the bracket, an armature for the magnet having seats engaging the knife edge fulcrums, and a spring clip sleevedover the attaching flange portion and engaging against the armature to retain said seats of the armature in engagement with the knife edge fulcrums.

5. In an apparatus of the character described, a bracket having foot and attaching portions, a magnet carried by the foot portion of the bracket, an armature for the magnet, means pivoting the armature to the bracket, and a spring clip having a loop extending over the attaching portion of the bracket and having arms engaging under said attaching portion and bearing against the armature to retain the armature in pivoted position on the bracket.

6. In an apparatus of the character described, a bracket having spaced knife edge fulcrums upon opposite side edges of the bracket, a magnet carried by the bracket, an armature having a slotted opening to accommodate the bracket and provided with seats on opposite sides of said opening to engage the knife edge fulcrums, and means on the bracket yieldably retaining the armature in engagement with said fulcrums.

7. In an apparatus of the character described, a bracket having notched side edges forming spaced knife edge fulcrums, a magnet carried by the bracket, an armature having a slotted opening to accommodate the bracket and provided with V-shaped seats on opposite sides of said opening to engage the knife edge fulcrums, and a spring clip having a loop portion engaged over the bracket and having arms yieldably retaining the armature in engagement with said fulcrums.

8. In an apparatus of the character described, a bracket having laterally extending foot and attaching flange portions and having opposite sides thereof notched below the attaching flange portion to form knife edge fulcrums, a magnet carried by the foot portion of the bracket, an armature for the magnet having seats engaging the knife edge fulcrums, a spring clip sleeved over the attaching flange portion and engaging against the armature to retain said seats of the armature in engagement with the knife edge fulcrums, and a stop adjustably supported on the foot portion of the bracket for limiting movement of the armature in the direction of the magnet.

9. In an organ including a wind-box having a port leading to an organ pipe, a bracket having a foot portion and an attaching portion secured to the wind-box, a magnet carried by the foot portion of the bracket, an armature for the magnet having knife edge pivotal mounting on the bracket, a valve on the armature for closing said port, and a spring clip having a loop extending over the attaching portion of the bracket and having arms engaging under said attaching portion to bear against the armature to retain the armature in pivoted position on the bracket with the valve in closing registry with said port.

10. In an organ including a wind-box having a port leading to an organ pipe, a bracket having a foot portion and an attaching portion secured to the wind-box, a magnet carried by the foot portion of the bracket, an armature for the magnet having knife edge pivotal mounting on the bracket, a valve on the armature for closing said port, a spring clip having a loop extending over the attaching portion of the bracket and having arms engaging under said attaching portion to bear against the armature to retain the armature in pivoted position on the bracket with the valve in closing registry with said port, and a spring connecting the armature with the bracket to normally retain the valve in closing relation with said port.

11. In an apparatus of the character described, a bracket member, a magnet carried by the bracket member, an armature member for the magnet, a fulcrum for said armature member including a knife edge bearing on one of the members and a V-shaped seat on the other member, and means for retaining the knife edge bearing in said V-shaped seat.

ALBERT FLORO. ALBERT G. SABOL. 

